Plant Diseases (B.Sc. Agriculture)
Plant diseases, Diseases related to plants, Plant disorders
Questions
Fire blight of pome fruits is caused by
- Cryphonectria parasitica
- Erwinia amylovora
- Cochliobolus heterostrophus
- Phytophthora parasitica
Which disease does Magnaporthe grisea cause in rice?
- Leaf blight disease
- Blast disease
- Foot rot disease
- Brown spot disease
In which disease can purple brown mold be observed on leaf surface?
- Downy mildew
- Powdery mildew
- Bird's eye spot
- Scabs
Which plant is affected by black spot disease?
- Tulip
- Grape
- Rose
- Potato
With which of the following conditions are Cytospora and Nectria genus of fungi associated?
- Rust
- Wilts
- Cankers
- Blight
What is the economic importance of fungus Trichoderma harzianum?
- Plant pathogen
- Biocontrol agent
- Nitrogen fixation
- Animal disease
Which form of infection turns grapes brown and hardens them into small black berries?
- Rot
- Mildew
- Canker
- Rust
Which genus causes foot rot disease in rice?
- Burkholderia
- Erwinia
- Xanthomonas
- Pseudomonas
Which of the following is a bacterial disease of wheat?
- Southern blight
- Head blight
- Spike blight
- Agropyron mosaic
Which of the following crops is/are affected by Stewart's wilt?
- Grapes
- Cabbage
- Corn
- Bean
What is the infection by phytopthera on pepper, tomatoes and potatoes called?
- Early blight
- Late blight
- Fire blight
- Canker
Which lifestyle is followed by Pratylenchus (a nematode parasite on plants)?
- Semi-endoparasite
- Migratory endoparasite
- Ectoparasite
- Sedentary endoparasite
Which is the causative organism of bacterial wilt of potato?
- Pseudomonas fluorescens
- Dickeya solani
- Pectobacterium carotovorum
- Ralstonia solanacearum
Which of the following diseases is etiologically different from the others?
- Leaf blister
- Corn smut
- Citrus canker
- Downy mildew
What can be the possible cause of tipburn leaves on conifers?
- Bacterial infection
- Sunburn
- Ozone pollution
- Salinity